package com.snowball.demo.config;

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import com.alibaba.druid.support.spring.stat.DruidStatInterceptor;
import org.springframework.aop.Advisor;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.aop.support.JdkRegexpMethodPointcut;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Description: druid数据源状态监控配置
 *
 * @Author: genezhao
 * @Date: 2018-01-22
 */
@Configuration
public class DruidConfiguration {

    @Value("${druid.login.username}")
    private String username;

    @Value("${druid.login.password}")
    private String password;

    @Value("${druid.monitor.allow.ip}")
    private String allowIp;

    @Value("${druid.monitor.deny.ip}")
    private String denyIp;

    /**
     * 展示监控界面
     * 注册一个Druid内置的StatViewServlet,用于展示Druid的统计信息
     * @return
     */
    @Bean
    public ServletRegistrationBean druidStatViewServlet() {
        //org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid2/*");
        //添加初始化参数：initParams
        //白名单：
        servletRegistrationBean.addInitParameter("allow",allowIp);

        //IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
        servletRegistrationBean.addInitParameter("deny",denyIp);

        //登录查看信息的账号密码.
        servletRegistrationBean.addInitParameter("loginUsername",username);
        servletRegistrationBean.addInitParameter("loginPassword",password);

        //是否能够重置数据.
        servletRegistrationBean.addInitParameter("resetEnable","false");

        return servletRegistrationBean;
    }

    /**
     * Web关联监控配置
     * 注册一个：filterRegistrationBean,添加请求过滤规则
     * @return
     */
    @Bean
    public FilterRegistrationBean druidStatFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        //添加过滤规则.
        filterRegistrationBean.addUrlPatterns("/*");

        //添加不需要忽略的格式信息.
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid2/*");
        return filterRegistrationBean;
    }


    /**
     * 监听Spring
     *  1.定义拦截器
     *  2.定义切入点
     *  3.定义通知类
     * @return
     */
    @Bean
    public DruidStatInterceptor druidStatInterceptor(){
        return new DruidStatInterceptor();
    }

    @Bean
    public JdkRegexpMethodPointcut druidStatPointcut(){
        JdkRegexpMethodPointcut druidStatPointcut = new JdkRegexpMethodPointcut();
        String patterns = "com.snowball.*.*.service.*";
        String patterns2 = "com.snowball.*.*.mapper.*";
        druidStatPointcut.setPatterns(patterns,patterns2);
        return druidStatPointcut;
    }
    @Bean
    public Advisor druidStatAdvisor() {
        return new DefaultPointcutAdvisor(druidStatPointcut(), druidStatInterceptor());
    }
}
